Flashcards in Muscles of the Arm Deck (51)
Part of body that extends from shoulder to the elbow
The two groups of muscles that cause movement at the elbow joint
Name the three anterior arm muscles
Biceps Brachii (long and short head)
Anterior muscle of the arm that has two bellys, long and short, and two different origins with a common insertion
Which muscle of the biceps brachii is lateral?
What are the actions of the biceps brachii?
Primary supinator against resistance like tightening a screw
Biceps brachii that is medial and has a tendon attached to the corocoid process of the scapula that is often fused with the corachobrachialis
Muscle of biceps brachii that has a rounded chord like tendon that crosses the shoulder joint within the capsule of the shoulder
Held in place by the transverse humeral ligament
Long head of the bicep
The distal tendon of the biceps attaches to what structure?
What does it become after it continues after that point?
The radial tuberosity
It continues on to become the bicipital aponeurosis
A fibrous sheet or expanded tendon that serves as a muscle attachment along the medial aspect of the proximal part of the forearm
An area on the anterior surface of the elbow joint that is protected by the bicipital aponeurosis (veins lie superior to it for veinipuncture)
Where the long head of the bicep originates
Scapula at supraglenoid tubercle
When this tendon is torn, it results in a muscle bulge on the anterior of the arm known as the popeye deformity
Long head of the bicep
Nerve that innervates both of the muscles of the biceps brachii
musculocutaneous nerve from the
Biceps brachii are involved in which two types of movement?
Flexion and supination
The long head of the bicep has the ability to do what to the shoulder because it crosses the shoulder joint?
Flex the shoulder
Flattened muscle which lies deep to the biceps brachii
Where is the origin of the brachialis?
Insertion of the Deltoid (Deltoid tuberosity)
The brachialis is primarily responsible for what movement, particularly during slow movements?
Does it for both supinated and pronated positions unlike the biceps brachii.
Maintaining flexion of the forearm
Muscle that ALWAYS contracts during flexion of the elbow joint
What is the origin of the brachialis?
Coracoid process of the ulna
What nerve innervates the brachialis?
Arm muscle which may be considered part of the posterior forearm muscles that flexes the forearm, especially during quick movement
Does the brachioradialis cross the wrist joint? Can it cause wrist movement?
No and No
This muscle is active in rapid movements (flexion) of the forearm
The brachioradialis inserts where?
The styloid process of the radius
What is the origin of the brachioradialis?
Lateral supercondyle ridge.
What innervates the brachioradialis?
The radial nerve
The muscle that the musculocutaneous nerve goes through